According to North American Numbering Plan, 810230 located in FLINT, Michigan. the first three digits 810 locate to state Michigan, 230 locate the city FLINT, furthermore, we also provide some other information such as the zip code example(s) 48532, 48504, 48503, carrier AMERITECH MICHIGAN, and the latitude and longitude is 43.0315 -83.7723. Please pay attention that the detail we provide only as a reference, the details of the zip code may be not complete, the latitude and longitude likely to have deviation.